<template>  

  <div class="app-container">

       <!--查询表单-->
    <el-form :inline="true" class="demo-form-inline">
      <el-form-item>
        <el-input v-model="courseQuery.name" placeholder="课程名称"/>
      </el-form-item>
      <el-form-item>
        <el-select v-model="courseQuery.status" clearable placeholder="课程状态">
          <el-option :value="'Normal'" label="已发布"/>
          <el-option :value="'Draft'" label="未发布"/>
        </el-select>
      </el-form-item>

      <!-- <el-form-item label="添加时间">
        <el-date-picker
          v-model="teacherQuery.begin"
          type="datetime"
          placeholder="选择开始时间"
          value-format="yyyy-MM-dd HH:mm:ss"
          default-time="00:00:00"
        />
      </el-form-item>
      <el-form-item>
        <el-date-picker
          v-model="teacherQuery.end"
          type="datetime"
          placeholder="选择截止时间"
          value-format="yyyy-MM-dd HH:mm:ss"
          default-time="00:00:00"
        />
      </el-form-item> -->

      <el-button type="primary" icon="el-icon-search" @click="getList()">查询</el-button>

      <el-button type="default" @click="resetData()">清空</el-button>
    </el-form>
     <!-- 表格 -->

    <el-table
       v-loading="listLoading"
      :data="list"
      element-loading-text="数据加载中"
      border
      fit
      highlight-current-row>
      <el-table-column
        label="序号"
        width="70"
        align="center">
        <template slot-scope="scope">
          {{ (page - 1) * size + scope.$index + 1 }}
        </template>
      </el-table-column>
      <el-table-column prop="title" label="名称" width="180" />

      <el-table-column label="状态" width="80">
        <!-- 获取每一行中的 level数据，并进行三元判断  -->
        <template slot-scope="scope">
          {{ scope.row.status==='Draft'?'未发布':'已发布' }}
        </template>
      </el-table-column>

      <el-table-column prop="lessonNum" label="课时"  width="80" />

      <el-table-column prop="viewCount" label="浏览次数" width="80"  />

      <el-table-column prop="gmtCreate" label="添加时间" width="160"/>

      <el-table-column label="操作" width="200" align="center">

        <template slot-scope="scope">
          <!-- 调用隐藏路由 -->
          <router-link :to="'/teacher/edit/'+scope.row.id">
            <el-button type="primary" size="mini" icon="el-icon-edit">编辑课程基本信息</el-button>
          </router-link>

          <router-link :to="'/teacher/edit/'+scope.row.id">
            <el-button type="primary" size="mini" icon="el-icon-edit">编辑课程大纲信息</el-button>
          </router-link>

          <el-button type="danger" size="mini" icon="el-icon-delete" @click="removeDataById(scope.row.id)">删除课程信息</el-button>
        </template>
      </el-table-column>

    </el-table>
     
      <!-- 分页 -->
    <el-pagination
      :current-page="page"
      :page-size="size"
      :total="total"
      style="padding: 30px 0; text-align: center;"
      layout="total, prev, pager, next, jumper"
      @current-change="getList"
    />

 </div>  
  </template>

  <script>

    import courseApi from '@/api/edu/course'

    export default{
        data(){
            return {
                    listLoading:true,// 显示加载动画                   
                    courseQuery:{}, // 封装查询条件
                    list:[], // 课程列表
                    total:0, // 总记录数
                    page:1,  // 页码 默认 1
                    size:3,  //条数 默认 5
            }
        },
        created(){
            // 页面加载显示列表
            //this.getCourseList();

            this.getList();
        },
        methods:{

            // 条件查询
            getList(page=1){

                this.page =page ;
                this.listLoading =true;  // 显示加载动画

                courseApi.getCOurseListPage(this.page,this.size,this.courseQuery)
                  .then(response =>{
                      //console.log(response.data.row);
                       this.listLoading =false;  // 显示加载动画
                      this.list = response.data.row;
                      this.total = response.data.total;
                  });
            },

            // 表单清空
            resetData(){
              // 清空查询表单
                this.courseQuery = {};
                //加载列表
                this.getList();
            },

            // 删除课程
            removeDataById(courseId){
                    this.$confirm('此操作将永久删除该讲师的信息, 是否继续?', '提示', {
              confirmButtonText: '确定',
              cancelButtonText: '取消',
              type: 'warning'
            }).then(() => {
               
            courseApi.removeCourseInfo(courseId)
                .then(response=>{
                    this.$message({
                    type: 'success',
                    message: '删除成功'
                });  
                this.getCourseList();
            })
               
            }).catch(() => {
              this.$message({
                type: 'info',
                message: '已取消删除'
              });          
            });
            },

            // 查询 课程列表
            getCourseList(){
                courseApi.getCourseList()
                    .then(response =>{
                        this.list = response.data.courseList;
                    });
                    this.listLoading=false;
            }
        }
    }
  </script>